Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!RICHTER.MIT.EDU!krowitz
From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: Re: Unix eof detection  and  long filenames under tar.
Message-ID: <8905251356.AA07053@richter.mit.edu>
Date: 25 May 89 13:56:22 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 32

The -M3000 switch to /bin/cc is the same as the -CPU 3000
switch to /com/cc. It tells the compiler that the code
being generated will be run on a machine with a
Motorola 68020 or 68030 processor and a 68881 or 68882
floating point chip (or an FPX or FPA floating point
accelerator option running in 68881 emulation mode), and
the the code does not have to be downwards compatible
with the older 68010 based machines (ie. the DN300/320,
the DSP80/80A, the DN400/420/600, and the DN460/660).
By default, the compiler will generate code which can
be run on all of the Motorola based Apollo nodes (ie.
everything except the DN10000). This means using on
(only) 68010 integer instructions and performing all
floating point arithmetic using system calls (since some
of the earlier machines had no floating point processors).

Code compiled with the -M3000 / -CPU 3000 switch will
run quite a bit faster, especially if it does a lot of
floating point arithmetic, and it will execute on any of
the following machines:

DSP90, DN330, DN560/570/580/590, DN570-T/580-T/590-T,
DN3000/3500/4000/4500.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter@eddie.mit.edu
krowitz%richter@athena.mit.edu
krowitz%richter.mit.edu@mitvma.bitnet
(in order of decreasing preference)